Cederblad 110年轻星体凝聚体的ASTE亚毫米观测
ASTE Submillimeter Observations of a Young Stellar Object Condensation in Cederblad 110
摘要：
利用阿塔卡玛亚毫米波望远镜实验对Chamaeleon I暗云Cederblad 110区的低质量年轻恒星（YSO）凝聚进行了亚毫米波观测。我们的HCO+（J=4-3）地图揭示了一个致密的分子气体的程度为~ 0.1 pc，这是一个复杂的两个信封与I类源Ced 110 IRS 4和IRS 11和一个非常年轻的对象Cha-MMS 1。该区域的另外两个I类源IRS 6和NIR 89位于团簇外部，没有扩展的HCO+排放。MMS 1和IRS 4的HCO+丰度分别为2.6 x 10^{-10}和3.4 x 10^{-9}，与其他年轻源的报告值相当。在我们的12 CO（J=3-2）图中检测到IRS 4和IRS 6的双极流出。IRS 4的外流似乎与Cha-MMS 1碰撞。外流有足够的动量来影响MMS 1中的气体运动，尽管没有发现任何迹象表明已经发生了触发恒星形成。
英文摘要：
We present results of submillimeter observations of a low-mass young stellar objects (YSOs) condensation in the Cederblad 110 region of the Chamaeleon I dark cloud with Atacama Submillimeter Telescope Experiment. Our HCO+(J=4-3) map reveals a dense molecular gas with an extent of ~ 0.1 pc, which is a complex of two envelopes associated with class I sources Ced110 IRS4 and IRS11 and a very young object Cha-MMS1. The other two class I sources in this region, IRS6 and NIR89, are located outside the clump and have no extended HCO+ emission. HCO+ abundance is calculated to be 2.6 x 10^{-10} for MMS1 and 3.4 x 10^{-9} for IRS4, which are comparable to the reported value for other young sources. Bipolar outflows from IRS4 and IRS6 are detected in our 12CO(J=3-2) map. The outflow from IRS4 seems to collide with Cha-MMS1. The outflow has enough momentum to affect gas motion in MMS1, although no sign has been detected to indicate that a triggered star formation has occurred.
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